localhost ~ # emerge -pt aspell      
--- Invalid atom in /etc/portage/package.keywords: =media-video/x264-svn-encoder-20061014-r1~x86
--- Invalid atom in /etc/portage/package.keywords: media-libs/x264-svn-20061014
--- Invalid atom in /etc/portage/package.keywords: =media-video/x264-svn-encoder-20061014-r1~x86
--- Invalid atom in /etc/portage/package.keywords: media-libs/x264-svn-20061014

These are the packages that would be merged, in reverse order:

Calculating dependencies... done!
[ebuild  N    ] app-text/aspell-0.60.4-r1  USE="gpm nls"